STEM Resources for 3rd Grade

DK Knowledge Encyclopedia Science!

A visually stunning DK reference covering matter, forces, energy, chemistry, life science, earth science, and space—an ideal hardcover spine or companion for homeschool science across the elementary and middle years.

National Geographic Kids 5,000 Awesome Facts (About Everything!)

Thousands of true, bite-sized facts about science, nature, space, animals, history, and geography in National Geographic Kids' bold photo-packed style—a curiosity-building enrichment book for a wide range of ages.

Janice VanCleave's 201 Awesome, Magical, Bizarre, & Incredible Experiments

201 safe, low-cost, hands-on science experiments across biology, chemistry, physics, earth science, and astronomy using common household materials—a long-running homeschool favorite for elementary and middle school.

Usborne 100 Science Experiments

100 simple, hands-on science experiments—crystals, circuits, balloon rockets, kaleidoscopes and more—with clear illustrated steps and explanations. A low-prep, household-materials activity book for elementary homeschoolers.

ThinkFun Gravity Maze Marble Run Logic Game

A STEM marble run and logic puzzle combined, challenging kids to build towers and solve 60 puzzles that teach spatial reasoning, planning, and engineering thinking.

Scientific Explorer My First Mind Blowing Science Kit

A beginner-friendly chemistry kit with 11 colorful experiments that introduce young scientists to chemical reactions, acids, bases, and the scientific method.

Snap Circuits Classic SC-300 Electronics Kit

A hands-on electronics exploration kit with over 300 projects that teaches kids about circuits, electricity, and engineering through snap-together components.

National Geographic Mega Fossil Dig Kit

An excavation kit with 15 real fossils embedded in a dig brick, teaching kids about paleontology, geology, and prehistoric life through hands-on discovery.

4M Green Science Solar Robot Kit

A build-your-own solar-powered robot kit that teaches kids about renewable energy, mechanical engineering, and environmental science through hands-on construction.

Rosie Revere, Engineer

Inspiring picture book about a shy girl who learns that engineering is about persistence and learning from failure.

Ada Twist, Scientist

Beloved picture book about a curious girl who uses the scientific method to investigate the world — inspiring young scientists everywhere.

Coding Projects in Scratch

A beautifully illustrated Scratch programming guide with step-by-step coding projects for ages 8-14.

Lauren Ipsum: A Story about Computer Science and Other Improbable Things

A children's adventure novel that teaches computer science concepts through story — no coding required.

Coding for Kids: Scratch

A step-by-step Scratch programming guide for kids ages 8-12 with 10 creative coding projects.

Beast Academy Guide 3A

A challenging and fun comic-book style math curriculum from Art of Problem Solving, designed to develop deep mathematical thinking in elementary students.

Learning Resources Botley 2.0 Coding Robot Activity Set

Klutz LEGO Chain Reactions Craft Kit

Snap Circuits Jr. SC-100 Electronics Exploration Kit

ThinkFun Rush Hour Traffic Jam Logic Game

Usborne Big Book of Science Things to Make and Do

Magna-Tiles Classic 100-Piece Magnetic Construction Set

CircuitMess STEM Toys for Kids

TeachEngineering

A free, searchable library of more than 2,000 standards-aligned K-12 engineering lessons and hands-on activities from university engineering programs.

Exploratorium

The San Francisco science museum's free online collection of hands-on science activities, videos, and teaching resources for K-12.

PlayMath.org — Free Math Games for Deep Mathematical Thinking

Free, ad-free math games that build deep mathematical thinking through play — no accounts or installation required.

CodeMonkey Coding Adventure

Award-winning game-based coding course where kids ages 7-14 learn real text-based programming by helping a monkey catch bananas through 400+ progressively challenging levels.

CodeMonkey Game Builder

Creative coding course for ages 8-14 where students design, code, and publish their own games using real programming skills and professional game development concepts.